Yeah if you take him as a companion and get him to the point that you can collar him you are left with either the spiked collar (the bad boy) or the ribbon collar (the puppy bitch). If you want him totally in control and completely dominant you need to submit to him, I think throwing the fight and just plain losing count as well but don't quote me lol. The only sad thing about that is he wont join then but you can run into him while hunting and exploring, hes got his own little set of events just like if you collared him just........ reversed.

What do you have to do to get the scenes where Korvin collars you and has you fight monsters? I've automatically submitted to him many times and only get a couple scenes, do I have to hunt for specific events? I'm playing a male with mpreg, do you have to be female?

no you dont have to be female, but he does have a submit counter. After you have submitted enough he will have you go head to head with other creatures to prove your worth to him so far i know there is a orc warrior, tenrec and centaur you have to fight. He should also eventually put you in a state of auto submit to him where you arent given a choice anymore, when you have either earned your pink collar or spiked collar it should be listed in your feats.